Former U.S. Secretary of State Henry Kissinger gestures as he delivers the keynote address at the 2017 Margaret Thatcher conference on Security, in London, Tuesday June 27, 2017. Kissinger on Tuesday warned of Russia’s simmering alienation from its w

FILE - In this May 11, 1987 file photo, the then Britain's Prime Minister Margaret Thatcher waves to members of the media on returning to No. 10 Downing Street from Buckingham Palace after a visit with Queen Elizabeth II. Thatcher was Britain’s first female British prime minister and the country’s